Batching apparatus



NOV. .2, 1937. L, GAR N HQ SE 2,097,551

BATCHING APPARATUS Filed June 29, 1934 4 Sheets-Sheet 1 MOTOR SWITCH IN VENTOR AH GHRL INGHOUSE Nov. 2, 1937. H. GARLINGHOUSE BATCHING APPARATUS Filed June 29, 1934 4 Sheets-Sheet 2 INVENTOR. {Lfi GHRU, JGHUl/Sf ATTO NEY.

Nov. 2, 1937. H. GARLINGHOUSE BATCHING APPARATUS Filed June 29, 1934 4 Sheets-Sheet 3 INVENTOR. LHG/IKL /NGHOU5 4 Ill/l /ll// ATTCQDRNEY.

1937. L. H. GIARLINGHOUSE 2,097,551

BATCHING APPARATU S Filed June 29, 1954 4 Sheets-Sheet 4 INVENTOR.

BY .6 I37 ATTORNEY.

Patented Nov. 2, 1937 UNITED STATES PATENT OFFICE BATCHING APPARATUS 2 Claims.

This invention relates to improvements in batching devices.

The general object of the invention is to provide an improved batch weighing device.

Another object of the invention is to provide an improved discharge device for storage b s.

A further object of the invention is to .rovide a novel discharge device for storage bins which is automatically controlled by the weight of material discharged from the bin.

An additional object of my invention is to provide a hopper construction for handling bulk materials wherein a novel by-pass is provided.

Other objects and the advantages of this invention will be apparent from the following description taken in connection with the accompanying drawings wherein: I

Fig. 1 is a fragmentary side elevation of a batching device including the features of my invention;

Fig. 2 is a fragmentary end view of the device shown in Fig. 1 with portions thereof broken away;

Fig. 3 is a fragmentary section taken on line 33 of Fig. 2;

Fig. 4 is a fragmentary section taken on line 4-4 of Fig. 2;

Fig. 5 is a fragmentary enlarged section taken on line 5--5 of Fig. 1;

Fig. 6 is an enlarged fragmentary longitudinal section through one of the air cylinders;

Fig. '7 is a fragmentary section taken on line 1-1 of Fig. 6;

Fig. 8 is a fragmentary section taken on line B--8 of Fig. 1;

Fig. 9 is a view similar to Fig. 8 showing the discharge door of the storage bin in an open position;

Fig. 10 is an electrical wiring diagram of the device; and,

Fig. 11 is a view similar to Fig. 8 showing a modified form of discharge door for the storage bins.

Referring to the drawings by reference characters I have indicated my improved batching the walls l6 and I1 are spaced apart to form a discharge opening indicated at l9.

For closing the discharge opening I! I provide a gate member 20 which includes a pair of spaced side members 2| having an arcuate bottom member 22 secured thereto. The bottom member 22 is positioned across the discharge opening l9 and the side members are positioned adjacent the outer faces of the side walls [5 of the discharge device and are pivotally mounted as at 23 to a portion of the frame.

For opening and closing each of the gates 20 I provide a gate operating device indicated generally at 25 and shown in detail in Figs. 6 and 7. As shown the gate operating device 25 includes a closed cylinder 26 one end of which is pivotally mounted as at 21 on a bracket 28 which is secured to a portion of the frame l2. A suitable double faced piston 29 is provided in the cylinder 26 and includes a piston rod 30 which extends out of the cylinder at the end thereof opposite the pivot 21 through a suitable packing gland iii. The end of the piston rod 30 opposite the piston is pivotally secured as at 32 to a bracket 33 provided on the bottom plate 22 of the associated gate 20.

For directing air under pressure into the cylinder at one end thereof I provide a pipe 34 one end of which communicates with the interior of the cylinder and for directing compressed air into the cylinder at the opposite end thereof I provide a pipe 35 one end of which communicates with the interior of the cylinder.

For controlling the flow of air to and from the cylinder I provide a valve member 36. The valve 36 may be of any desired type suitable for the purpose. In the drawings I have shown the valve 36 as including a body portion 31 having a tapered chamber 38 therein in which a tapered rotor member 39 is mounted for rotation. As shown the body 31 includes a pair of opposed radial apertures 40 and 4|, a radial exhaust aperture 42 and an axial inlet aperture 43. The end of the pipe 34 opposite the cylinder end thereof communicates with the valve aperture 40 and the end of the pipe 35 opposite the cylinder end thereof communicates with the valve aperture 4|. A pipe 44 communicates with the valve inlet aperture 43 and is adapted to convey air under pressure from a suitable source of supply (not shown) to the valve (see Fig. '7). Y

The valve rotor 39 includes an axial recess 45 which opens towards the valve inlet aperture 43 and extending from the end of the rotor opposite the recess 45 the rotor includes a reduced operating stem 46 which extends out of the valve body through an aperture 41 provided therein. Extending radially from the recess 45 the rotor includes an aperture 48 and an aperture 49 which is positioned at an angle to the aperture 48. The rotor further includes an exhaust recess or groove 50 provided in the outer face thereof between the apertures 48 and 49 and with the ends thereof spaced from the apertures.

When the valve rotor 39 is in the position shown in Fig. 6 the aperture 48 therein communicates with the body aperture 49 thereby directing compressed air into the pipe84 and when the rotor is in its other position the aperture 49 thereof communicates with the body aperture 4| thereby directing compressed air into the pipe 35. The exhaust recess 50 of the rotor at all times communicates with the exhaust aperture 42 in the body and when compressed air is directed in the pipe 34, as previously described, the exhaust recess 58 communicates with the body aperture 4| thus placing the pipe 35 in communication with the exhaust aperture 42 and when compressed air is directed into the pipe 35 as previously described the exhaust recess 58- communicates with the body aperture 40 thus placing the pipe 34 in communication with the exhaust aperture 42.

When compressed air is directed into the pipe 34 it enters the cylinder 26'and forces the piston 29 towards the packing gland 3| thereby moving the piston rod 30 which in turn swings the gate 20 to a closed position as shown in Fig. 2.

When compressed air is directed into the pipe 35 it enters the cylinder 26 and forces the piston 29 towards pivot end of the cylinder thereby moving the piston rod 39 which in turn swings the gate 29 to an open position as shown in Fig. 9. For rotating the valve rotor 39 I provide an operating arm 5| one end of which is secured to the rotor stem 46 and extends upward therefrom.

Supported on brackets 28 I provide a solenoid coil 53 and an associated core member 54 to which one end of a rod 55 is secured. The end of the rod 55 opposite the'core 54 is slidably supported by a bracket 55. On the rod 55 I provide a pair of spaced pins 51 which project therefrom and are positioned one adjacent each side of the valve operating arm 5|. Secured to the rod 55 intermediate the pins 51 and the free end thereof 1 provide a collar 58 and surrounding the rod 55 between the collar 58 and the bracket 56 I provide a coiled spring 59.

The spring 59 normally urges the rod 55 to- 'wards the solenoid 53 which in turn retains the,

valve operating arm 5| in a position wherein the rotor directs compressed air into the pipe 34 thereby retaining the gate 29 in a closed position. When the solenoid coil 53 is energized as will be described hereinafter, it attracts the core 54 thereinto which moves the rod 55 against the action of the spring 59 thereby swinging the valve operating arm 5| to a position wherein the valve rotor directs compressed air into the pipe 35 which as previously described moves the piston and piston rod to a position to swing the gate 20 to anopen position.

At theside of the chamber 8 opposite the gate operating device 25 the discharge device l4 includes a chamber 60. The side walls of the chamber 60 are continuations of the Walls I5 and the wall I! forms one end wall while a wall 6| spaced from the wall N forms the other end positioned tangent with the wall 52- above the cylinder wall. The bottom of the chamber 68 is open to form a discharge opening indicated at 62.

Intermediate its height the wall includes an aperture 63 which forms a communicating passageway between the chambers l8 and 60.

Positioned in the chamber 68 I provide a rotor member 64 which includes spaced annular end plates 65 connected by a hub portion 66 and between the end plates 65 the rotor includes a plurality of spaced radially extending plates or blade members 51. Adjacent the lower edge of the aperture 63 in the wall I! the rotor 64 is I1 and between the rotor and the wall below the aperture 63 I preferably provide a filler block 68. The hub of the rotor is secured to a shaft 69 which extends out through the side walls 2| and is journaled in suitable bearing members 18 secured to the side walls 2|.

At one side of the discharge device a sprocket II is secured to the rotor shaft 69 and is adapted to be driven in the direction indicated by the arrow A, (Fig. 2) by a sprocket chain 12 from a sprocket 13 mounted on the armature shaft of a motor 14 which is suitably mounted on a portion of the frame l2. When material such as gravel is positioned in the storage bin |3 it fills thechamber I8 of the discharge device l4 and some of the material passes through the aperture 63 in the wall into the chamber 60. A continuous flow of material from the chamber |8 into the chamber 68 is restricted by the materialpiling up against the blades 81 of the rotor 64. When the motor 14 is operated to rotate the rotor 64 material is carried in the spaced portion between a the rotor blades 61 and fallstherefrom through the discharge aperture 62.

The means and method of operating the motor 14 will be fully described hereinafter.

Positioned below the discharge devices I4 I provide a weighing hopper 15 which is adapted to receive the material discharged from the devices M. The method of supporting the hopper I5 will be described hereinafter. As shown the hopper 15 includes spaced downwardly convergent side walls 18 and spaced downwardly convergent end walls ll with the top and bottom of the hopper open. a v

For closing the bottom of the hopper I provide a pair of opposed gate members 18 each of which includes a bottom plate 19 secured to upwardly extending spaced end members 88 which are pivotally mounted on a trunnion 8| which is supported by a bracket 82 suitably secured to the hopper. Each of the end members 80 has gear toothed portions 83 which are coaxial with the axis of their associated trunnions 8|. The gear teeth of each associated pair of members 8|] intermesh so that when one gate member is swung on its pivots the other will be likewise moved.

Any suitable means may be used to operate the gates 18 but I have shown an operating lever 84 which is pivotally mounted as at 85 on a bracket 88. The bracket 86 is shown as mounted on a platform 81 which is suitably supported by the frame l2.

Intermediate the length of the lever 84 one end of a bar 88 is pivotally secured thereto as at 89. The opposite end of the bar 89 is pivotally connected as at 98 adjacent one end of a bar 9|, the opposite end of which is pivotally secured as at 92 to a bracket 93 mounted on the hopper. Intermediate the length of the bar 9| one end of a pair of bars 94 are pivotally secured thereto as at 95 to a bracket 91 which extends downward from one of the gate plates 19. Thus it will be seen that when the lever 84 is swung about its pivot away from the hopper 15 the gate 18 which includes the bracket '91- will be swung outward about its pivot 8| and when it is thus moved it will swing the other gate in the opposite direction through the medium of the intermeshing gear teeth 83. Thus the two gates 18 are swung to an open position. When the lever 84 is swung about its pivot 85 towards the hopper 15 the gates 18 are simultaneously moved towards each other to a closed position as shown in Fig. 2.

Secured to each of the side walls 18 of the hopper 15 I provide an angle member 98 and each end of the angle members 98 are connected by angle members 99.

For weighing the material in the hopper 15 I provide a standard beam scale the adjustable portion of which is indicated at I88 and is shown as including a housing MI in which the usual tare beam I82, weight beams I83, I84 and I85 and lock members I85 therefore are mounted.

The housing MI is shown as mounted on a frame I81 which is supported by a plurality of rods I88 which in turn are suspended from brackets I89 secured to the bins I3. The bar beam I82 is operatively connected in the usual manner by a'rod I I8 to one of the balance beams II2 of the scale which in turn is shown as suspended by a link device II3 from the frame I81. Other balance beams I I4 are also suspended from the frame I81 by link devices H5 and the angle members 98 which are mounted on the hopper are supported by a plurality of rods II8 which are pivotally suspended as at I I1 from the beams II4. Thus it will be seen that the hopper 15 is supported by the balance beams of the scale device. The scale is provided with a standard automatic indicator H8 which includes a housing II9 mounted on the scale housing IN. The indicator device II8 includes the usual pivoted wheel I28 having an indicator finger I2I thereon which is adapted to indicate a predetermined weight by swinging to a position in line with an indicator mark I22 provided in the housing H9. The indicator wheel I28 is actuated in the usual manner by a rod I23 which includes a yoke portion I24 which is pivotally connected to the tare beam I82. The tare beam I82 is shown as operatively connected to the beams I 83, I84 and I85 by the usual yoke member I25 which includes cross bars I25 on which the beams I83, I84 and I85 rest when the locking members I88 are released. In the accompanying drawings the beam I83 is used to weigh the material delivered from the number 1 bin I3 into the hopper 15, the beam I84 to weigh the additional material delivered from the number 2 bin I3 into the hopper 15 and the beam I84 to weigh the additional material delivered from the number 3 bin I3 into the hopper 15.

In addition to the indicator wheel I28 the indicator device II8 includes two hollow cylindrical tube members I28 and I21 which are mounted to turn with the indicator wheel I28. The tubes I28 and I21 are made of an electrical insulation material and are half filled with mercury. The tube I28 controls the operation of the solenoid cores 52 and the tube I21 controls the operation of the motors 14 as will be fully described hereinafter.

In Fig. 10 I have diagrammatically shown the manner of wiring the control devices of my batching apparatus. As shown in Fig. 10 I provide a control switch indicated generally at I38 which includes three sets of motor contacts one set for each motor 14 each of which includes three motor contacts I3I and three line contacts I32. The

switch I38 further includes three sets of solenoid contacts one set for each solenoid 53 each of which includes two solenoid contacts I33 and two line contacts I34. The switch I 38 is shown as including an electrically insulated switch arm I35 which is pivoted at I38 and includes contact bars I31 and I38 thereon. The switch arm I35 is further shown as having a ratchet I39 mounted thereon which is engaged by a pawl- I48 to prevent the switch arm from being turned in the direction opposite to that indicated by the arrow B.

For controlling the flow of current to the motors 14 I provide a standard magnetic motor switch I which includes three line switch arms I42 with associated contacts I 43, an electro-magnetic coil I 44, a coil switch arm I45 with an associated contact I48.

For controlling the flow of current to the solenoid coils 53 I provide a similar standard magnetic switch I41 which includes two line switch arms I48 with associated contacts I49, an electromagnetic coil I5I and a coil switch arm I58 with an associated contact I 52.

For momentarily directing a flow of current to the coils I 44 and I5I I provide a standard opencircuit push button switch I53 which includes a pair of contacts I54 and I55 which are adapted to be bridged by a contact bar I58 and for breaking the flow of current to the coils I44 and I5I I provide a standard closed circuit push button switch I51 which includes a pair of contacts I58 and I59 which are normally bridged by a contact bar I88.

In addition to the standard equipment of the motor switch I I provide a magnetic switch I8I which includes an electro-magnetic coil I8I' having an associated armature switch arm I82 which normally engages an associated contact I83.

S'milarly the switch I41 in addition to the standard equipment includes a magnetic switch I85 which includes an electro-magnetic coil I88 having an associated armature switch arm I81 which normally engages an associated contact I88.

0n the indicator arm I 2I I provide a contact I89 which when the scale device is inoperative engages a contact I18. On the mercury switch tube I26 I provide a pair of spaced contacts HI and I12 which are adapted to be bridged by the mercury in the tube I28 and on the mercury switch tube I21 I provide a pair of spaced contacts I13 and I14 which are adapted to be bridged by the mercury in the tube I21. As shown electric current is directed from a suitable source of electrical energy (not shown) through wires I15, I16 and I11 to the contacts I43 of the switch MI and a master switch device I18 is preferaby' interposed in the lines I15, I18 and I11.

The motor switch arms I43 are each connected by a wire I19 to associated contacts I32 of all three sets of the motor contacts of the control switch I38 and each contact I3I of each set is connected by a wire I88 to its associated motor 14. Thus when electric current is directed to the switch I and the switch arms I42 of the switch I engage their associated contacts I43 and the contact bar I31 of the control switch I38 bridges a set of contacts I3I and I32 an electric circuit is completed from the source of supply to the motor 14 associated with the bridged set of contacts HI and I32 whereupon the motor will operate.

One end of the coil I44 of the switch MI is connected by a wire IN to the contact I54 of the push button switch I53 and the other contact I55 of the switch I53 is connected by a wire I82 to the contact I69 on the indicator arm I2 I. The associated contact I18 is connected by a wire I83 to the line wire I11. The coil contact I46 of the switch MI is connected by a wire I84 to the wire I8I and the opposite end of the coil I44 is connected by a wire I85 to the contact I63 and its associated switch arm I62 is connected by a wire I86 to the contact I59 of the push button switch I51. The associated contact I58 is connected by a wire I81 to the line wire I16. One end of the coil I6I' of the switch I62 is connected by a wire I88 to the wire I83 and the opposite end of the coil I62 is connected by a wire I89 to the contact I14 of the mercury switch I21. The associated contact I13 is connected by a wire I98 to the wire I81.

From the foregoing it will be apparent that when the indicator arm I2I is in its normal position as indicated by the dotted lines with the contact I69 engaging the contact I18 and the contacts I54 and I55 of the push button switch I53 are bridged by the contact bar I56 current flows through the wires I11 and I83 to the contact I18 through the contact I69 and the wire I82 to the contact I55 of the switch I53 thence through the contact bar I56 to the contact I53 and then through the wire I8I to one end of the coil I44 of the switch I4I.

From the opposite end of the coil I44 the current flows through the wire I85 to the contact I63 and thence through the switch arm I62 and the wire I86 to the contact I59 of the push button switch I51. From the contact I59 the current flows through the contact bar I68 to the contact I58 and thence through the wire I81 to the wire I16 thereby energizing the-coil I44 which actuates the switch arms I82 and I45 into engagement with their associated contacts. Thereafter the coil I44 is retained energized by engagement of the switch arm I45 and its contact I86.

To manually break the circuit to the motors the push button switch I51 is actuated to move the contact bar I68 thereof out of engagement with the contacts I58 and I59 thereby breaking the circuit to the coil I48 of the switch IM whereupon the switch arms I42 and 845 move out of engagement with their associated contacts.

One of the contacts I89 of the switch I41 is connected by a wire I92 to the wire I81 and the other contact I49 is connected by. a wire I93 to the wire I83. The switch arms I48 are each connected by a wire I 93 to associated contacts I34 of all three sets of the solenoid contacts of the control switch I38 and each contact I33 of each set is'connected by a wire I95 to opposite ends of its associated coil 53.

Thus when electric current is directed to the switch I41 and the switch arms I48 engage their associated contacts I49 and the contact bar I38 of the'control switch bridges a set of contacts I33 and I34 an electric circuit is completed through the coil 53 thereby energizing the coil which in turn attracts its associated core 56 thereto and moves the rod 55 in the direction indicated by the arrow.

One end of the coil I SI of the switch I41 is connected by a wire I96 to the wire I8I and the wire I98 is connected by a wire I91 to the contact I52. The opposite end of the coil II is connected by a wire I98 to the contact I68 of the switch I65 and the switch arm I61 is connected by a wire I99 to the wire I86. One end of the coil I66'of the switch I65 is connected by a wire 288 to the wire I83 and the opposite end of the coil I66 is connected by a wire 28I to the contact I12 of the mercury switch I 26 and the associated contact III is connected by a wire 282 to the wire I98.

From the foregoing it will be apparent that when the indicator arm is in its normal position and the push button switch I53 is actuated to bridge the contacts I54 and I55 as previously described current flows from the wire I83 to the coil I5I and then through the wire I98 to the contact I68 and then through the switch arm I61 and the wire I99 to the wire I86 thereby energizing the coil I5I which actuates the switch arms I 48 and I58 into engagement with their associated contacts thereby directing current to the solenoid contacts I34 of the control switch I 38. Thereafter the coil I5I is retained energized by engagement of the switch arm I58 and the contact I52.

To manuaily break the circuit to the solenoid coils 53 the push button switch I51 is actuated to break the circuit between the contacts I58 and I59 as previously described thereby breaking the circuit to the coil I5I whereupon the switch arms I 48 and I88 move out of engagement with their associated contacts.

In operation the bins I3 are filled with the desired material to be mixed and the scale beams I83, I88 and I85 are set to weigh the desired amount of material to be delivered from their associated with the bridged set of contacts wt and I32 operates and rotates its associated rotor 64 which in turn conveys a portion of the material in the chamber I8 into the chamber 68 from whence it is discharged into the hopper 15 as previously described.

When the switch I41 is closed the solenoid 53 associated with the bridged set of contacts I33 and I34 is energized and actuates the valve 38 to direct compressed air into the cylinder 26 to move the piston and piston rod 38 to swing the gate 28 to an open position as previously described and shown in Fig. 9. whereupon-the material in the chamber I8 of the associated discharge device I8 is discharged into the hopper 15.

As the material collects in the hopper 15 the indicator arm I2I ofthe automatic indicating device II8 moves upward towards the indication mark I22. At a predetermined distance before the indicator arm I2I registers with the indication mark I22 the contact I II of the mercury switch moves the mercury thereby actuating the solenoid I66 to break circuit to the solenoid 53 as previously described whereupon the spring 59 moves the rod 55 as previously described which in turn actuates the valve 36 to direct compressed air into the cylinder 26 to move the piston and piston rod in the direction to swing the gate 28 to a closed position. The motor continues to actuate the rotor 64 until the-indicator arm I 2I registers with the indication mark I22 in which position the contact I14 01' the mercury switch moves into the mercury thereby actuating the solenoid I6I' to break the circuit to the motor 14, as previously described. After the correct amount of material has been delivered from the number one bin I3 into the hopper 15 the operator releases latch I06 of scale beam I04 and sets the control switch I30 to actuate the motor 16 and solenoid 53 associated with the second bin and after the correct amount or material has been delivered from the number two bin I 3 into the hopper 15 the operator releases latch I06 of scale beam I05 and sets the control switch I 30 to actuate the motor 14 and the solenoid 53 associated with the third bin.

After the correct amount of material has been delivered from each of the three bins I3 into the hopper 15 the operator actuates the lever 86 to open the gates 16 to discharge the contents of the hopper.

In Fig. 11 I have indicated a modified form of discharge device generally at 205. As shown the discharge device 205 is similar in most respects to the discharge device I4 and similar portions thereof are indicated by similarly primed reference numerals. The chamber I8 of the discharge device 205 includes an angular discharge opening 206 which is adapted to be closed by a gate 201 which includes a closure plate 208 mounted on side members 209 which are pivotally supported as at 2I0. One of the side members 209 has an operating arm 2 I2 secured thereto by means of which it is adapted to be swung to an open position. Adjacent the end of one of the side members opposite the pivot 2I0 I pro- I vide a pin 2I3. Above the gate 201 I provide a horizontal arm 2 pivotally mounted adjacent one end as at 2I5 and adjacent the opposite end the arm 2 includes a hooked portion 2I6.

,, Intermediate the length of the arm 2 I provide a solenoid coil 2 I1 having an associated core member 2I8. The core 2I0 includes a pin 2I0 on which the arm 2 I4 normally rests.

When the discharge device 205 is used the contacts "I and I12 the mercury switch I26 are positioned so that they are normally unbridged by the mercury and when the indicator arm I2I moves upward a predetermined distance and the switch I26 is rotated a predetermined distance the contacts HI and I12 are bridged by the mercury thereby energizing the coil 2". When the coil 2I1 is energized it forces the core 2I0 upward which through the medium of the pin 2I9 swings the arm 2 upward.

To discharge the contents of the chamber II of the discharge device 2I5 an operator swings the lever 2I2 downward whereupon the gate 201 swings upward and when it is fully open the gate pin 2| 3 passes beyond the hooked portion 2I6 oi the arm 2 which then retains the gate in an open position as indicated by the broken lines until the correct amount 01 material has been discharged into the hopper 16. whereupon the coil 2I1 is energized as previously described and moves the core 2I0 upward which is turn swings the arm 2 upward thereby moving the hooked portion 2I6 of the arm out 01 the path of travel of the gate pin 2I3 whereupon the gate 201 swings downward to a closed position.

From the foregoing description it will be apparent that I have invented an improved batching apparatus which can be economically manufactured and which is highly eflicient in use.

Having thus described my invention, I claim:

1. In a batching apparatus, a hopper, a bin, said bin having a discharge aperture leading to said hopper, a closure for said aperture, a scale device, said hopper being the scale-pan of said scale device, pneumatic means for moving said closure, electro-magnetic means for actuating the moving means of said closure, a scale beam adapted to weigh a desired amount of material delivered from the bin, said bin having an auxiliary discharge aperture spaced from the first discharge aperture, said auxiliary aperture discharging into said hopper, a conveyor disposed in said auxiliary aperture, means operable upon movement of said closure to open position to simultaneously cause movement of the conveyor in the auxiliary aperture associated with the bin to convey material from the bin through said auxiliary discharge aperture into the hopper, means controlled by the movement of the scale beam associated with said bin, caused by the weight of material in said hopper, to actuate said electro-magnetic means to move the closure of said bin to closed position, and other means operated by the scale beam associated with said bin and effective after the closure of said bin is closed and said hopper has received an additional weight of material to stop said conveyor.

2. In a batching apparatus, a hopper, a bin, said bin having a discharge aperture leading to saidhopper, a closure for said aperture; a scale device, said hopper being the scale-pan of said scale device, fluid meansfor moving said closure,

a scale beam adapted to weigh a desired amountof material delivered from said bin, said bin having an auxiliary discharge aperture spaced from the first discharge aperture and discharging into said hopper, a conveyor disposed in said auxiliary aperture, means to cause actuation of said fluid means to thereby move the closure to open position and to simultaneously cause movement oi the conveyor in the auxiliary aperture to convey material from the bin through both apertures into the hopper, means controlled by the movement of the scale beam associated with said bin caused by the weight of material in said hopper to actuate said moving means to move the closure oi said bin to closed position, and other means operated by the scale beam associated with said bin and eflective after the closure of said bin is closed and said hopper has received an additional weight of material to stop said conveyor.

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